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  • Dorsal lateral geniculate nucleus  (2)
  • Axon collateralization  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Comments on the fine structural organization of the dorsal lateral geniculate nucleus of the mouse (1974)
    Springer
    Anatomy and embryology 145 (1974), S. 261-267 
    Details
    ISSN: 1432-0568
    Keywords: Dorsal lateral geniculate nucleus ; Morphology (ultrastructure) ; Mouse ; Synaptic vesicles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Neuronal perikarya, dendrites, extraglomerular neuropil, and synaptic glomeruli were examined by electron microscopy in the dorsal lateral geniculate nucleus (LGd) of the mouse. Particular attention was paid to boutons containing “flattened” synaptic vesicles. In line with recent studies of rat LGd (Lieberman and Webster, 1972; Lieberman, 1973), but in contrast to the findings of Rafols and Valverde (1973) on the mouse LGd, two distinct classes of ‘flat’-vesicle-containing boutons could be distinguished. P-boutons—were traced to and probably originate entirely from the presynaptic dendrites of the intrinsic neurons. They are concentrated within the glomeruli and are postsynaptic as well as presynaptic, being the intermediate elements in numerous intraglomerular serial synapses. F-boutons—are interpreted as axon terminals and are exclusively presynaptic. Some were traced from myelinated fibres. Synaptic vesicles are more concentrated in F-boutons than in P-boutons, appear flatter, and lie in a darker matrix. F-boutons synapse extensively in the extraglomerular neuropil, but are outnumbered by P-boutons in the glomeruli. The synaptic relationships established within the glomeruli are summarized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00519637
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Dendritic invagination of developing optic tract axons in the hamster (1988)
    Springer
    Experimental brain research 73 (1988), S. 519-522 
    Details
    ISSN: 1432-1106
    Keywords: Retinogeniculate pathway ; Axonal branching ; Dorsal lateral geniculate nucleus ; Anterograde HRP labelling ; Visual system development
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Between E15 and P4 in the hamster, axons of retinal ganglion cells in the optic tract over the dorsal lateral geniculate nucleus, are invaginated by, and make synaptic contacts with, small processes interpreted as tips or appendages of geniculate dendrites. In some cases a branch-like protrusion emerges from the axon at or close to the invagination. We hypothesize that the invaginations may be part of the mechanism by which retinocollicular axons are induced to branch and establish the retinogeniculate pathway.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406609
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Evidence for collateral projections to the retrosplenial granular cortex and thalamic reticular nucleus from glutamate and/or aspartate-containing neurons of the anterior thalamic nuclei in the rat (1997)
    Springer
    Experimental brain research 116 (1997), S. 63-72 
    Details
    ISSN: 1432-1106
    Keywords: Key words Amino acid immunocytochemistry ; Axon collateralization ; Thalamus ; Fluorescent tracers ; Limbic system ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Small, stereotaxically guided injections of true blue (TB) were made into the retrosplenial granular cortex (RSg) and of diamidino yellow (DY) into the dorsal portion of the rostral pole of the thalamic reticular nucleus (TRN) in 16 adult rats to determine whether axons projecting from the anterior thalamic nuclear complex (ATN) to the TRN are branches of axons also projecting to the RSg. Following injections of the fluorescent dyes, serial coronal sections of the brain revealed single retrogradely labelled, and large numbers of double retrogradely labelled neuronal cell bodies in the ipsilateral anteroventral and anterodorsal nuclei and smaller numbers in the anteromedial nucleus of the ATN complex. In a se- cond series of six adult rats with similar double injections of TB and DY, two sections in three were immunoreacted, one with antiserum against glutamate and one with antiserum against aspartate, using indirect immunofluorescence with rhodamine to detect reactive cells. The great majority of both single and double retrogradely labelled cell bodies were also immunoreactive for aspartate or glutamate. In addition, a moderate to small number of non-immunolabelled neurons projecting to the TRN and/or to the RSg were also found in all three nuclei of the ATN complex. These results are compatible with the possibility that large numbers of neurons in the ATN send axonal branches to both the RSg and the TRN, and that many such neurons use glutamate and/or aspartate as transmitters. The findings also suggest that the projections from the ATN might be heterogeneous with respect to transmitter phenotype.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00005745
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    Paper (German National Licenses)
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